This topic has 1 reply, 1 voice, and was last updated 3 days, 10 hours ago by Barry Neal Cooper. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts May 3, 2026 at 11:03 am #34480 Reply Barry Neal CooperKeymaster [ARCHIVE QUESTION] Originally asked in NGB forums: May 3, 2026 at 11:47 am #34558 Reply Barry Neal CooperKeymaster [ARCHIVE ANSWER] Charcoal filters are used in grow rooms to completely eliminate marijuana odors to humans. Dogs can still smell it. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) Reply To: Reply #34558 in Does charcoal work to throw dogs off my trail? Your information: Name (required): Mail (will not be published) (required): Website: Submit